The tale begins around the end of the 3rd season...

Even with Nobuyuki and Rea's wedding coming up in a few days, the Masaki household, though busy with
preparations for the wedding, their everyday situation is still par for the course for the Masaki house.
In space too, people connected to the Masaki house are making preparations in order to attend the wedding.
Airi is battling mountains of paperwork, and Funaho, who can't attend the wedding because the survival of
Yosho hasn't been made public, gives her wedding gift to Minaho.
A few days before the wedding, people connected to the Masaki house gather on earth and Tenchi meets his aunt Minaho.
"...she reminds me of mom..." that's Tenchi's first impression, quite natural as she's also Airi's daughter.
The scent of trouble is in the air..
We got permission for it, so work until 
the very last moment is possible.
حصلنا على إذن لها، لذا فالعمل حتّى
اللّحظة الأخيرة مُمكن
Sie haben nun eine
Nutzungserlaubnis erhalten,
Tiene permiso para usarla esta vez,
Tiene permiso para usarla esta vez,
la reliant jusqu’à chez Mme Washu.
Abbiamo avuto il permesso di usarlo, 
quindi lavorerà fino all'ultimo momento utile.
Nós conseguimos permissão para usá-lo, então
ela pode trabalhar até o último segundo.
Мы выбили для неё разрешение,
так что она может работать до последнего.